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Calcium Oxide - Vietnam

IUPAC Name	: Oxocalcium
Cas Number	: 1305-78-8
HS Code	: 2522.10.00
Formula	: CaO

Basic Info

Appearance Name	: White or Grayish-White Lumps or Powder
Common Names	: Lime, Hi-Cal Quicklime, Calcium Oxide, Burnt Lime, QL
Packaging	: 25 Kg PP/PE Bags

Industry

Pulp and Paper

Water Treatment Chemicals

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Technical Document

Brief Overview

Calcium oxide (CaO), also known as quicklime or burnt lime, is a highly corrosive and alkaline white crystalline solid at room temperature. Being an inexpensive compound to produce, along with calcium hydroxide, they are important chemicals for numerous industries. Calcium oxide has a melting point of 2570â„ƒ (4658â„‰) and a boiling point of 2850â„ƒ (5162â„‰). Calcium oxide dissolves in water to produce calcium hydroxide, an alkaline solution with a chemical formula of Ca(OH)₂, also known as hydrated lime.

Manufacturing Process

Calcium oxide is produced by thermal decomposition of calcium carbonate of calcium carbonate materials such as limestone in a lime kiln. The limestone is first mined and then crushed and washed, removing the impurities. The material is heated during calcination or lime burning, releasing carbon dioxide and leaving behind quicklime. This reaction is reversible and quicklime can react with carbon dioxide to convert back to calcium carbonate. Therefore, carbon dioxide is readily removed to prevent the conversion back to calcium carbonate.